68772766213 has 4 divisors (see below), whose sum is σ = 71144240940. Its totient is φ = 66401291488.

The previous prime is 68772766211. The next prime is 68772766243. The reversal of 68772766213 is 31266727786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47629570564 + 21143195649 = 218242^2 + 145407^2 .

It is a cyclic number.

It is not a de Polignac number, because 68772766213 - 2¹ = 68772766211 is a prime.

It is a super-2 number, since 2×68772766213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68772766211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185737320 + ... + 1185737377.

It is an arithmetic number, because the mean of its divisors is an integer number (17786060235).

Almost surely, 2^68772766213 is an apocalyptic number.

It is an amenable number.

68772766213 is a deficient number, since it is larger than the sum of its proper divisors (2371474727).

68772766213 is a wasteful number, since it uses less digits than its factorization.

68772766213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371474726.

The product of its digits is 7112448, while the sum is 55.

The spelling of 68772766213 in words is "sixty-eight billion, seven hundred seventy-two million, seven hundred sixty-six thousand, two hundred thirteen".